<!DOCTYPE html>
<html>
<head lang="en">
    <meta  charset="UTF-8">
    <title>测试</title>

    <script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>

    <style>
        #divCs{
            background-color: #0000cc;
            color: red;
            width: 100px;
            height: 100px;
            text-align: left;
            float: left;
        }

        p{
            color:rosybrown;
        }
    </style>
</head>
<body>


<div id="divCs" >
123
</div>
<h1>h1</h1>
<p>ppp</p>

<script>
    //alert('弹出警告');
    //console.log('');
    /*多行注释*/

    //x = "JohnJohn";
    //y= x.match('John');
    //y= x.replace('Joh','6666');





</script>

</body>
</html>